OK, good news, my deal came off so my CS3111 is up for grabs.
To give you a bit of history, it's this beauty here, purchased direct from Nic at Chronomatic:
http://chronomatic.com/reeditioncarrera.html
The watch head is exactly as shown in the link (it's never been worn outdoors) and is complete with original caseback sticker as shown.
As I mentioned above, it has the quirk where the caseback is stamped CS3110.
I removed the non-original strap and fitted a very dark brown Hirsch rally strap. You can see this in this thread:
http://forums.calibre11.com/threads/my-modest-collection.37696/#post-433879
It also did not come with it's original 18mm buckle, but again I purchased one separately. Same as this:
http://i.ebayimg.com/images/g/tK8AAOSwv0tVbIZE/s-l300.jpg
The watch did not come with it's original box/case but I purchased one separately with booklet. Same as this:
http://i.ebayimg.com/00/s/MTE5NVgxNjAw/z/WjkAAOSwl9BWJS1c/$_1.JPG
Insured delivery to Norway is pretty pricey so I'm going to have to ask £1600 net to me.
EDIT: I just found the black perforated strap shown in the Chronomatic pics. I'll throw that in too!